package org.dromara.northstar.support.utils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtil implements ApplicationContextAware {

	// 获取bean工厂，用来实现动态注入bean
	// 不能使用其他类加载器加载bean
	// 否则会出现异常:类未找到，类未定义
	public static DefaultListableBeanFactory getBeanFactory() {
		return (DefaultListableBeanFactory) getApplicationContext().getAutowireCapableBeanFactory();
	}

	public static List<Map<String, Object>> getAllBean() {

		List<Map<String, Object>> list = new ArrayList<>();

		String[] beans = getApplicationContext().getBeanDefinitionNames();

		for (String beanName : beans) {
			Class<?> beanType = getApplicationContext().getType(beanName);

			Map<String, Object> map = new HashMap<>();

			map.put("BeanName", beanName);
			map.put("beanType", beanType);
			map.put("package", beanType.getPackage());
			list.add(map);

		}

		return list;
	}

	/**
	 * 上下文对象实例
	 */
	private static ApplicationContext ctx;

	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		ctx = applicationContext;
	}

	/**
	 * 获取applicationContext
	 *
	 * @return
	 */
	public static ApplicationContext getApplicationContext() {
		return ctx;
	}

	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}

}
